Lawn Mower

ABSTRACT

A vegetation cutting apparatus including a movable carriage having a conveyance system for facilitating conveyance of the carriage over ground. The conveyance system can have conveyance members for facilitating such conveyance. A cutting system can be mounted to the carriage for cutting vegetation. The cutting system can include at least one cutting member which is positionable laterally around the periphery of at least one conveyance member for enabling cutting of vegetation laterally around the at least one conveyance member.

RELATED APPLICATION

This application is a divisional of U.S. application Ser. No.13/298,401, filed Nov. 17, 2011. The entire teachings of the aboveapplication are incorporated herein by reference

BACKGROUND

Most lawn mowers typically have one or more rotating blades mounted to achassis between a set of wheels. The blades are most often powered by agas engine to provide sufficient power to the blades, since the bladesare often thick and heavy and are rotated at high speed. A typical pushmower can have a cutting width of about 18 inches wide, and industrialor self propelled mowers can often have a cutting width up to 42 to 52inches. In order to cut such large widths in an industrial or selfpropelled mower, a large gas engine is required to provide sufficientpower for the blades. In contrast, electric powered robotic mowerstypically have small cutting widths, such as 12 inches, in order to keepelectrical power requirements low enough so that a battery can providepower long enough to cut a lawn.

SUMMARY

The present invention provides a vegetation cutting apparatus such as alawn mower having an energy efficient cutting design that enables alarger cutting width than prior art battery powered lawn mowers.

The present invention can provide a vegetation cutting apparatusincluding a movable carriage having a conveyance system for facilitatingconveyance of the carriage over ground. The conveyance system can haveconveyance members for facilitating such conveyance. A cutting systemcan be mounted to the carriage for cutting vegetation. The cuttingsystem can include at least one cutting member which is positionablelaterally around the periphery of at least one conveyance member forenabling cutting of vegetation laterally around the at least oneconveyance member.

In particular embodiments, the cutting apparatus can be a lawn mower.The conveyance members can include a set of wheels. The at least onecutting member can be positionable laterally around the set of wheelsfor enabling cutting of vegetation laterally around the set of wheels.The set of wheels can include two side drive wheels, and front and rearfree wheeling wheels. The front and rear free wheeling wheels can beswiveling caster wheels. The cutting system can include a rotary memberrotatably mounted about a rotary member rotational axis which rotates atleast one cutting blade laterally around the at least one conveyancemember. The rotary member can have two rotary arms extending on oppositesides of the rotary member rotational axis. Each rotary arm can rotate arespective cutting blade around the at least one conveyance member. Thecutting blades can be replaceable. In one embodiment, each cutting bladecan be also rotated relative to its respective rotary arm about arespective cutting blade rotational axis.

In another embodiment, the cutting system can include a stationaryperipheral vegetation ring member positioned around the at least oneconveyance member for laterally engaging the vegetation. The rotatingcutting blades can be rotated relative to and adjacent to peripheralsurfaces of the stationary peripheral vegetation ring member for cuttingthe laterally engaged vegetation. The peripheral surfaces of thestationary peripheral vegetation ring member can include at least oneportion that has a curve with an increasing radius moving in a rotaryarm rotational direction for facilitating cutting action.

A protective grill can substantially surround a lateral periphery of thecutting system. The protective grill can include a series of grillmembers that are spaced apart from each other for blocking lateralpassage of large objects to the cutting system while allowing thepassage of vegetation to be cut.

First and second cameras can be mounted to the cutting apparatus andface in two different directions. Images from the first and secondcameras can be combined together to form a single combined image toprovide remote viewing of the cutting apparatus. The images can becombined together with pixel smoothing. The cameras can be mounted to astructure extending above the carriage and can each have views. Onecamera can be angled downwardly forwardly and the other camera can beangled downwardly rearwardly. The views of the cameras can be overlappedwith each other. The single combined image can show front and rear ends,and sides, of the cutting apparatus as well as some adjacentenvironment. In some embodiments, the cutting apparatus can have morethan two cameras mounted thereto, and the images from the more than twocameras can be combined together to form the single combined image.

The present invention can also provide a lawn mower including a movablecarriage including a conveyance system having a set of wheels forconveying the carriage over ground. A cutting system can be mounted tothe carriage for cutting grass. The cutting system can include a rotarymember which rotates cutting blades laterally around the set of wheelsfor enabling cutting of the grass laterally around the set of wheels.

The present invention can also provide a cutting apparatus including astationary peripheral vegetation ring member for laterally engagingvegetation. A rotary blade can rotate relative to and adjacent toperipheral surfaces of the stationary peripheral vegetation ring memberfor cutting the laterally engaged vegetation.

The present invention can also provide a spreading apparatus including amoveable carriage having a conveyance system for facilitating conveyanceof the carriage over ground. The conveyance system can includeconveyance members for facilitating such conveyance. A spreading systemcan be mounted to the carriage for spreading spreadable components. Thespreading system can include at least one spreading member which ispositionable laterally around the periphery of at least one conveyancemember for enabling spreading of the spreadable components laterallyaround the at least one conveyance member.

The present invention can also provide a viewing system for a mobileapparatus including a first viewing camera mounted above the mobileapparatus and angled downwardly forwardly. A second viewing camera canbe mounted above the mobile apparatus and angled downwardly andrearwardly. Images from the first and second cameras can be overlappedwith each other and combined together to form a single combined imageshowing front and rear ends, and sides, of the mobile apparatus as wellas some adjacent environment, to provide remote viewing of the mobileapparatus.

The present invention can also provide a method of cutting vegetationincluding conveying a movable carriage of a cutting apparatus overground. The movable carriage can have a conveyance system withconveyance members for facilitating such conveyance. Vegetation can becut with a cutting system that is mounted to the carriage. The cuttingsystem can include at least one cutting member which is positionablelaterally around the periphery of at least one conveyance member forenabling cutting of vegetation laterally around the at least oneconveyance member.

In particular embodiments, the cutting apparatus can be a lawn mower. Aset of wheels can be the conveyance members. The at least one cuttingmember can be positioned laterally around the set of wheels for enablingcutting of vegetation laterally around the set of wheels. The set ofwheels can have two drive wheels, and front and rear free wheelingwheels. Swiveling caster wheels can be the free wheeling wheels. Atleast one cutting blade of the cutting system can be rotated laterallyaround the at least one conveyance member with a rotary member. Therotary member can be rotatably mounted about a rotary member rotationalaxis. The rotary member can have two rotary arms extending on oppositesides of the rotary member rotational axis. Each rotary arm can rotate arespective cutting blade around the at least one conveyance member. Thecutting blades can be replaceable. In one embodiment, each cutting bladecan be also rotated relative to its respective rotary arm about arespective cutting blade rotational axis.

In another embodiment, vegetation can be laterally engaged with astationary peripheral vegetation ring member positioned around the atleast one conveyance member. The rotating cutting blades can be rotatedrelative to and adjacent to peripheral surfaces of the stationaryperipheral vegetation ring member for cutting the laterally engagevegetation. The peripheral surfaces of the stationary peripheralvegetation ring member can have at least one portion that has a curvewith an increasing radius moving in a rotary arm rotational directionfor facilitating cutting action.

A lateral periphery of the cutting system can be substantiallysurrounded with a protective grill. The protective grill can include aseries of grill members that are spaced apart from each other forblocking lateral passage of large objects to the cutting system whileallowing the passage of vegetation to be cut.

First and second cameras can be mounted to the cutting apparatus andface in two different directions. The images from the first and secondcameras can be combined together to form a single combined image toprovide remote viewing of the cutting apparatus. Images can be combinedtogether with pixel smoothing. The cameras can be mounted to a postextending above the carriage and each camera can have views. One cameracan be angled downwardly forwardly and the other camera can be angleddownwardly rearwardly. The views of the cameras can be overlapped witheach other. The single combined image can show front and rear ends, andsides, of the cutting apparatus as well as some adjacent environment. Insome embodiments, more than two cameras can be mounted to the cuttingapparatus, and the images from the more than two cameras can be combinedtogether to form the single combined image.

The present invention can also provide a method of mowing a lawnincluding conveying a moveable carriage of a lawn mower over ground. Themoveable carriage can include a conveyance system having a set ofwheels. Grass can be cut with a cutting system mounted to the carriage.The cutting system can include a rotary member which rotates cuttingblades laterally around the set of wheels enabling the cutting of thegrass laterally around the set of wheels.

The present invention can also provide a method of cutting vegetationincluding laterally engaging vegetation with a stationary peripheralvegetation ring member on a cutting apparatus. The laterally engagedvegetation can cut with a rotary blade rotating relative to and adjacentto peripheral surfaces of the stationary peripheral vegetation ringmember.

The present invention can also provide a method of spreading spreadablecomponents including conveying a movable carriage of a spreadingapparatus over ground. The moveable carriage can include a conveyancesystem having a set of wheels. The spreadable components can be spreadwith a spreading system mounted to the carriage. The spreading systemcan include at least one spreading member which is positionablelaterally around the periphery of at least one conveyance member forenabling spreading of the spreadable components laterally around the atleast one conveyance member.

The present invention can also provide a method of viewing a mobileapparatus including mounting a first viewing camera above the mobileapparatus and angled downwardly forwardly. A second viewing camera canbe mounted above the mobile apparatus and angled downwardly rearwardly.Images from the first and second cameras can be overlapped with eachother and combined together to form a single combined image showingfront and rear ends, and sides, of the mobile apparatus as well as someadjacent environment, to provide remote viewing of the mobile apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing will be apparent from the following more particulardescription of example embodiments of the invention, as illustrated inthe accompanying drawings in which like reference characters refer tothe same parts throughout the different views. The drawings are notnecessarily to scale, emphasis instead being placed upon illustratingembodiments of the present invention.

FIG. 1 is a perspective view of an embodiment of a vegetation cuttingapparatus or lawn mower in the present invention.

FIG. 2 is a perspective view of an embodiment of a movable carriage andcutting system of a vegetation cutting apparatus or lawn mower.

FIG. 3 is a top view of the embodiment of FIG. 2.

FIG. 4 is a schematic drawing of an embodiment of a conveyance systemfor a vegetation cutting apparatus or lawn mower moving in a straight orforward direction.

FIG. 5 is a schematic drawing of the embodiment of FIG. 4 moving in atight circle or turn, or zero turning radius.

FIG. 6 is a schematic perspective drawing of an embodiment of the lawnmower cutting a lawn around a tree or bush.

FIG. 7 is a top view of another embodiment of a movable carriage andcutting system of a vegetation cutting apparatus or lawn mower in thepresent invention.

FIG. 8A and 8B are schematic drawings showing vegetation or grass beingcut with a cutting blade in FIG. 8A, and vegetation or grass being cutwith the combination of a cutting blade and a stationary vegetation ringmember in FIG. 8B.

FIGS. 9 and 10 are schematic side views of an embodiment of a vegetationcutting apparatus or lawn mower showing an embodiment of a viewingsystem arrangement.

FIG. 11 is a plan schematic view of the viewing system arrangement ofFIGS. 9 and 10.

FIG. 12 is a schematic drawing of an image provided by an embodiment ofthe viewing system.

FIG. 13 is a schematic drawing of an embodiment of a protective grill orguard for the cutting blades and cutting system.

FIG. 14 is a schematic top view of an embodiment of a rotary spreadingmember on a spreading apparatus in the present invention.

DETAILED DESCRIPTION

FIGS. 1-3, depict an embodiment of a cutting apparatus such as avegetation cutting apparatus or lawn mower 10 in the present invention,which can cut items extending upwardly from a surface such as the ground22 a, such as vegetation or grass 31, such as in a field or lawn 22(FIG. 6). The lawn mower 10 can have a protective safety housing, guardor cover 8, mounted over a moveable carriage 32. The moveable carriage32 can have a conveyance or drive system, device, apparatus, mechanismor arrangement 70, for facilitating or driving the carriage over groundsurfaces 22 a or a lawn 22. A cutting system, device, apparatus,mechanism or arrangement 72 can be mounted to the carriage 32, which cancut radially around the periphery of the conveyance members or wheels 13and 13 a of the conveyance or drive system 70.

The housing 8 can cover or extend over the carriage 32, the drive system70 and the cutting system 72. An upper or central housing portion 8 acan extend over, around and cover the carriage 32. A lower or outerhousing portion 8 b can extend from and around the bottom of housingportion 8 a, and can extend around and cover the outer periphery ofcutting system 72. In some embodiments, the outer perimeter of housing 8can be generally round in shape, and the upper 8 a and lower 8 b potionscan be generally flattened cylindrical or disc shaped. The housing canbe formed of a metal or light weight material, such as aluminum,plastic, fiberglass or composites, or combinations thereof, and caninclude one or more pieces.

The cutting system 72 can include a rotary or rotating bridge or member20 that is rotatably mounted to carriage 32 along or about a verticalrotary member rotational axis V_(r) for rotating cutting members orblades 12 around the carriage 32 and drive system 70. The rotary member20 can be coupled to a drive shaft 52 that is connected and rotatablydriven by a drive motor 54 (FIG. 4). The drive shaft 52 can extendupwardly from the frame, chassis or housing 32 a of carriage 32 forcoupling, connecting or attaching to rotary member 20. The rotary member20 can have two rotary arms 20 a each with cutting blades 12. The rotaryarms 20 a can extend on opposite sides of the axis V_(r) generally inalignment with each other, which can provide dynamic rotationalbalancing of rotary member 20. The rotary arms 20 a can extend inalignment with each other along a lateral axis R_(m). Each rotary arm 20a can have a first or inner horizontal portion 34 a extending radiallyoutward from axis V_(r) along axis R_(m), which rotates horizontally orlaterally over the top of carriage 32 and housing 32 a. A secondintermediate vertical portion 34 b can extend downwardly from thehorizontal portion 34 a for extending downwardly outside the housing 32a of the carriage 32 and drive system 70, towards the ground 22 a. Athird horizontal distal end portion 34 c can extend horizontally fromthe vertical portion 34 b radially outward along axis R_(m). A cuttingmember or blade 12 can be mounted to the distal end portion 34 c of eacharm 20 a for horizontally or laterally rotating or moving its positionaround the lateral periphery of the carriage 32 and drive system 70 forcutting vegetation or grass 31 horizontally or laterally around thecarriage 32 and drive system 70 as the rotary member 20 rotates in thedirection of arrows 42. Each cutting blade 12 can have two cutting bladesegments, lengths or portions 12 a which are mounted to or extend fromopposite sides of a rotatable drive hub or shaft 36. Each drive shaft 36can be rotatably connected to and driven about a respective verticalcutting blade rotational axis V_(c) by a drive motor 21. Each drivemotor 21, drive shaft 36 and cutting blade 12 can form a cuttingassembly 72 a. Each drive motor 21 can be mounted to the upper side orsurface of a distal end portion 34 c of a respective arm 20 a, and thecorresponding drive shaft 36 and cutting blade 12 can extend below eachportion 34 c.

In use, each drive motor 21 can rotate a cutting blade 12 about an axisV_(c) in the direction of arrow 76 for cutting vegetation or grass 31laterally adjacent or next to, or outside the carriage 32 in a generallycircular cutting pattern 18 that is relatively small in size. The drivemotor 54 can rotate rotary member 20 about axis V_(r), which rotates thecutting assemblies 72 a and the rotating cutting blades 12 in thedirection of arrows 42 horizontally or laterally around the outside orperiphery of the carriage 32 and drive system 70. This movement ofposition or rotation of the cutting assemblies 72 a can move thecircular cutting patterns 18 formed by the cutting blades 12 of thecutting assemblies 72 a around the carriage 32 in a peripheral orcircular motion which can form a larger peripheral generally circular orannular cutting pattern 38 having an outer periphery, boundary,circumference or diameter 38 a, and an inner periphery, boundary ordiameter 38 b. The rotary member 20 can rotate in the direction of arrow42 which can be in the same direction of rotation of cutting blades 12in the direction of arrow 76, so that the cutting blades 12 can haveincreased apparent velocity for cutting vegetation or grass 31, thatcombines the velocity of rotary member 20 with the velocity of cuttingblades 12. In some embodiments, the rotations can be in the oppositedirections. The radius of the outer 38 a, and inner 38 b boundaries candiffer by the length of the cutting blade 12, or in other words theannular width of the annular cutting pattern 38 can be equal to thelength of the cutting blade 12, when both cutting blades 12 are the samelength and positioned the same distance away from axis V_(r). The innerboundary 38 b can extend closely around the carriage 32 and wheels 13and 13 a of the drive system 70. Although two rotary arms 20 a forrotating two cutting assemblies 72 a are often employed, in otherembodiments, only one rotary arm 20 a, can rotate one cutting assembly72 a and one blade 12, or more than two rotary arms 20 a can rotate morethan two cutting assemblies 72 a and blades 12, such as, three or four.

The cutting blades 12 can be short and small in size and weight, so thatsmall drive motors 21 can be used in cutting assemblies 72 a to rotatethe blades 12. The cutting edges of cutting portions 12 a of the cuttingblades 12 can be angled or curved in or into the direction of rotationof arrows 76, which can facilitate the cutting action. In otherembodiments, blade portions 12 a and blades 12 can be angled orstraight. The cutting blades 12 can be sharp razor type blades that arethin and light, weighing only a few ounces, and can be, for example, 1%of the weight of standard mower blades which are long, thick and heavy.As a result, the cutting blades 12 can be replaceable and disposable.Such a lightweight sharp blade can be rotated at a slower speed thanstandard lawn mower blades, thereby requiring less energy. Despite usingrelatively small or short cutting blades 12, one or more cuttingassemblies 72 a and cutting blades 12 can be rotated by a rotatingmember 20 around the carriage 32 and drive system 70, such that largecutting widths or diameters can be obtained. The drive motors 21 and 54can each be relatively small motors so that large cutting widths can beobtained while at the same time minimizing energy consumption. A smallenergy requirement for blades 12 which can cut a large cutting width,allows the drive motors 21 and 54 of the lawn mower 10 to be electricand run from a rechargeable battery.

For example, in one embodiment, the cutting blades 12 can be 8 incheslong with a 4 inch radius, which can provide a cutting pattern 18 withan 8 inch diameter. The 8 inch long cutting blades 12 can be formed fromtwo 3 inch long blades that form the cutting portions 12 a, which aremounted to a drive shaft 36 that has a 2 inch diameter. The cuttingblades 12 can be rotated about axes V_(c) that are located at positionson arms 20 a about 17 inches radially outward from axis V_(r), therebyforming a cutting radius of about 21 inches, and a total cutting widthor diameter of 42 inches. This can result in a cutting pattern 38 havingan outer diameter 38 a of 42 inches and an inner diameter 38 b of 26inches. However with forward motion, with regard to actual cutting, thesize of the inner diameter 38 b is not relevant to the total cuttingwidth. The rotary member 20 can be rotated at a speed of about 30 rpm(slow), and the cutting blades 12 can be rotated about 30 to 35 timesfaster, such as about 1000 rpm. The drive system 70 can have a 18 inchwheel base between wheels 13. It is understood that the wheel base ofthe drive system 70 and the length of the cutting blades 12 can bevaried, and that the length of rotary arm can be varied or adjusted toprovide various desired sizes of cutting patterns 18 and 38. The rotarymember 20 can rotate one revolution per one inch travel of the lawnmower 10, allowing two cutting passes of the cutting assemblies 72 a.This can allow grass 31 to be cut and recut multiple times, such as over10 times, sometimes 16 times, per pass by the lawn mower 10.Furthermore, the cutting assemblies 72 a and axes V_(c) can be set,oriented or positioned at an angle, where the axes V_(c) can be tiltedrelative to vertical, such that the tips of the cutting blades 12 passcloser to the ground 22 a further away from axis V_(r) and higher abovethe ground 22 a closer to axis V_(r), whereby the vegetation or grass 31can be cut multiple times as the lawn mower 10 advances. The directionof tilt of axes V_(c) can be varied as chosen. If desired, the cuttingassemblies 72 a can have blades 12 set at two different heights to aidin mulching. In other embodiments, the blades 12 can be at the sameheight.

Referring to FIGS. 4 and 5, the drive system 70 can include two sidedrive wheels 13 rotatably coupled to housing 32 a on the right side Rand the left side L. The drive wheels 13 can be rotatably coupled to anddriven by a respective drive motor 56 about a horizontal drive wheelaxis H_(d). Front 13 a and rear 13 b free wheeling idler or casterwheels can be rotatably, pivotably or swivelably mounted to housing 32 aat the front and rear of housing 32 a between wheels 13, each about arespective vertical pivoting axis V_(p). Each pivoting axis V_(p) allowwheels 13 a and 13 b to pivot about or around their axes V_(p) in thedirection of arrows 44. The two pivoting axes V_(p) of wheels 13 a and13 b can be aligned with each other on the center line axis C_(L) ofcarriage 32 and housing 32 a, and each wheel 13 a and 13 b can freewheel or idle about a respective horizontal axis H_(f). Consequently, inuse, to move the lawn mower 10 in a straight line or path in thedirection of arrow 46, the drive wheels 13 can be driven by drive motors56 equally or at equal speeds, which aligns the wheels 13 a and 13 b ina straight manner along center line axis C_(L) for travel in a straightline along arrow 46. To turn, the drive wheels 13 can be driven atdifferent speeds. For example, to turn left, the right side R drivewheel 13 can be driven faster than the left side L drive wheel 13, andto turn right, the left side L drive wheel 13 can be driven faster thanthe right side R drive wheel 13. The wheels 13 a and 13 b can each pivotabout respective axes V_(p) during turning. Drive system 70 can alsoturn or rotate carriage 32 in place in the direction of arrow 48, whenthe drive wheels 13 are rotated in opposite directions, and wheels 13 aand 13 b pivoted generally in the direction of arrow 48. As can be seen,drive system 70 can allow for tight turns including zero turning radiusturns, to be made in any direction, even in place, and can provide highmaneuverability around objects.

Referring to FIG. 6, lawn mower 10 can cut a path or pass 17 through alawn 22, and can travel or be driven in a straight line or path 46 forcutting open portions of the lawn 22 in a straight line, and can travelor be driven in a curved path 76 to cut around objects, articles orobstructions 16 in the lawn 22, such as a tree, shrub or bush. By havinga round shape that can turn in any direction, and by having the cuttingblades 12 rotating around the carriage 32 and the drive system 70, thelawn mower 10 can maneuver and cut closely around objects 16 in the lawn22, despite also being able to have a wide cutting width such as 42inches. The lawn mower 10 can be manually pushed or controlled, remotelycontrolled, or robotically controlled, and movement can bepreprogrammed, or can be controlled in real time by sensors, includingvision systems, for example 80 (FIGS. 9 and 10).

Referring to FIG. 7, lawn mower 11 is another embodiment of a lawn mowerin the present invention which differs from lawn mower 10 in that it hasa cutting system, device, apparatus, mechanism or arrangement 74 mountedto and laterally about or around carriage 32. Cutting system 74 can havecutting blades 19, for example two, that are fixed in place, such asrigidly, to opposite ends of the rotary member 20, each to a rotary arm20 a. A cutting blade 19 can be fixed to the distal end portion 34 c ofeach arm 20 a at height D₁ (FIGS. 8A and 8 b) pointing in the directionof rotation 42 of the rotary member 20. This moves the cutting edge 25of each cutting blade 19 in the direction of rotation 42. The cuttingedge 25 can face radially inwardly and can be angled slightly outwardlyfrom the tangent line 78 of the rotation of rotary member 20 to promotecutting of vegetation or grass 31, with minimal resistance. The cuttingblades 19 can be light weight sharp razor type blades that arereplaceable and disposable. The cutting system 74 can also include agenerally round stationary peripheral vegetation or grass engaging ringmember 23 that is mounted to the housing 32 a of carriage 32 withsecurement members or spokes 23 b that extend radially outwardly. Thering member 23 can horizontally or laterally encircle the carriage 32,and can be located or positioned adjacent to the moving cutting blades19, for example, underneath. The ring member 23 can laterally engagevegetation or grass 31 surrounding carriage 32 and drive system 70, forexample, as the carriage 32 moves. The ring member 23 can have one ormore, or a series of, outwardly facing lateral vegetation or grassengaging portions 23 a that each have an outwardly facing peripheralsurface or edge 24 that can have a curve with an increasing radiusstarting at a radially inward portion 24 a and moving radially outwardlyin the rotational direction 42 of motion of the rotary member 20 to aradially outward portion 24 b for facilitating cutting action. Eachgrass engaging portion 23 a can be separated from each other by a step24 c and extend in series around the perimeter of ring member 23. As ablade 19 is rotated by rotary member 20, the blade 19 forms a narrowgenerally, vee shaped notch, space or opening 26 with edge 24 at theradially inward portion 24 a that is closed at one end or the bottom,and widens facing in the direction of rotation 42. Vegetation or grass31 can be trapped or engaged within the vee shaped notch 26 between theblade 19 and edge 24, and as the blade 19 rotates relative to the edge24, the size of the vee shaped notch 26 can become smaller untildisappearing or becoming closed 27 at the radially outward portion 24 b.This can form a cutting pattern 38 that generally extends around theperiphery of ring member 23 and grass engaging portions 23 a, as thevegetation or grass 31 is cut between the blades 19 and the edges 24with rotation of the blades 19 and the notch 26. When the blades 19 arerotated in close proximity or in contact with the surface of ring member23 or edges 24, this can create a scissor, shearing or wiping action forcutting vegetation or grass 31, where the cutting edge 25 of the blade19 engages and cuts the vegetation or grass 31 laterally engaged ortrapped between edges 25 and 24 until the vee shaped notch 26 becomesclosed 27, or blades 24 and 25 overlap. The edge 24 can be sharpened tofacilitate cutting action, and the cutting edge 25 of blade 19 can havea slight concave curve. In some embodiments the blades 19 and 24 can beshaped and/or positioned to provide a notch 26 that remains constant insize. Additionally, in some embodiments, the ring member 23 can beformed from a portion of the housing 32 a, for example, an edge orflange of the housing 32 a, and if desired, separate or individual edges24 can be mounted thereto. The blades 19 are shown rotating above edges24, but in some embodiments, can be rotated below edges 24. Also in someembodiments, the edges 24 can be inwardly facing, and the cutting edge25 of blades 19 can be configured and positioned appropriately facingoutwardly, to engage inwardly facing edges 24.

Referring to FIG. 8A, in some embodiments, the ring member 23 can beomitted, and when cutting the grass 31 at a height of D₁, the vegetationor grass 31 can be laterally bent or deflected to position 31 a beforethe cut is made. However, the vegetation or grass 31 cutting ability canbe improved with ring member 23. Referring to FIG. 8B, the edge 24 of agrass engaging portion 23 a of ring member 23 can laterally support thevegetation or grass or blades of grass 31 against lateral bendingmoments caused by a laterally striking cutting blade 19 to allow lateralcutting without significant lateral deflection to position 31 a. In someembodiments, a gap D₂ having a width of about the thickness of a pieceof vegetation or blade of grass 31 or more, can separate blade 19 fromedge 24 and still facilitate cutting without significant lateraldeflection since the vegetation or grass 31 is laterally supported byedge 24 against lateral bending moments with a lateral resistivecounterforce. A gap D₂ between blades 19 and edges 24 can reducefriction and the energy required for rotating blades 19. The use of thering member 23 (FIG. 8B) can allow a lower rotational speed for rotatingblades 19 with rotary member 20 than if the ring member 23 were omitted(FIG. 8A).

In some embodiments, the lawn mowers 10 and 11 do not have to be round,and the cutting systems 72 and 74 do not have to cut around the wholecarriage 32 or drive system 70, but can be positionable, rotate or cutaround the periphery of at least one or more conveyance members orwheels 13 or 13 a, and still can provide increased cutting width and/ormaneuverability. Drive systems with other suitable wheel configurationscan be employed, and in some embodiments, the drive wheels 13 and 13 acan be replaced with other conveyance members, such as tractor treads,or legs for walking over terrain. Although the rotary member 20 has beenshown with straight horizontal and vertical portions, rotary member 20can have other suitable configurations for positioning and rotatingcutting blades 12 and 19, and can be curved. Rotary member 20 can haveone or more than two rotary arms 20 a for rotating at least one or morethan two cutting members or blades 12 and 19. Blades 12 and 19 aretypically rotated by rotary member 20 in a circular cutting path, but ifdesired in some embodiments, the cutting path can be made noncircular,by using appropriate mechanisms. Non circular paths can include linearor elliptical paths, or paths including one or more linear and/or curvedpaths.

Referring to FIGS. 9-12, to facilitate remote viewing or operation oflawn mower 10 or 11, a vision system or arrangement 80 can be included.The vision system 80 can have two or more cameras 28 and 29 mounted overthe foot print of the lawn mower 10 or 11, such as to a structure orpole 50, that in turn is mounted to the lawn mower 10 or 11, such as tothe carriage 32 or the housing 8. The pole 50 can have a verticalportion 50 a and a rearwardly extending portion 50 b, to which aforwardly directed 28 and a rearwardly directed 29 camera can be mountedabove the rear end of the lawn mower 10 or 11. The forwardly directedcamera 28 can be angled downwardly forwardly for viewing an area orfield of view A for generating an image of the field of view A of thelawn mower 10 or 11 from above the rear end of the lawn mower 10 or 11,looking downwardly forwardly, showing regions to the sides and in frontof the lawn mower 10 or 11. The rearwardly directed camera 29 can beangled downwardly rearwardly for viewing an area or field of view B, forgenerating an image of the field of view B of the lawn mower 10 or 11from above the rear end of the lawn mower 10 or 11, of the rear end ofthe lawn mower 10 or 11, looking downwardly rearwardly, showing regionsto the sides and behind the lawn mower 10 or 11. There can be anoverlapping view region C, where the two fields of views A and B overlapeach other. Region C can be made large as seen in FIG. 9, or can be verynarrow, such as an inch. Together, the field of views A and B canprovide a large multiple view coverage 30 of the lawn mower 10 or 11,and the surrounding environment.

The two images from the two fields of view A and B can be sent to acomputer or a controller 82, which can be by wireless communication. Theimages from the multiple views A and B, can be combined together into asingle viewable image 30A (FIG. 12) on a screen 59, which can beconnected to or can be part of the computer or a controller 82. Thecomputer or controller 82 can include controls for controlling theoperation of lawn mower 10 or 11, which can be performed remotely. Thecombined image 30A can be formed by joining an image Al that is at leasta portion of the image generated from the field of view A by camera 28,with an image B1 that is at least a portion of the image generated fromthe field of view B by camera 29. The two images A1 and B1 can be joinedtogether along a dividing, separation or combination line 58 thatdivides, separates, or combines the two images A1 and B1 together into asingle viewable combined image 30A. The image A1 can be formed bytruncating the image of view A at or along a line or axis 82 (FIG. 11)that can be within overlapping region C, and image B1 can be formed bytruncating the image of view B at or along the same line or axis 82.This allows the two images A1 and B1 when joined together alongcombination line 58, to provide a single combined image 30A on screen 59that shows or gives the general appearance of viewing the lawn mower 10or 11 from a distance behind, looking forward, as if one was walkingbehind the lawn mower 10 or 11. Not only does the lawn mower 10 or 11appear to be seen from behind, but the lawn 22 behind, on both sides andin front of the lawn mower 10 or 11 can be seen in the image 30A, aswell as any objects 16 in the lawn 22 such as a tree, shrub or bush.This allows the user to remotely view the lawn mower 10 or 11 on screen59, to remotely control and/or view the operation of lawn mower 10 or 11in a manner that simulates the view of a person pushing or walkingbehind a lawn mower. This can enable effective and efficient mowing of alawn 22, including maneuvering around and cutting close to objects 16 onthe lawn 22. This illusion or appearance of walking behind the lawnmower 10 or 11 can be achieved by two cameras 28 and 29 mounted abovethe lawn mower 10 or 11, which can provide a view that can be generallyequivalent to positioning a forwardly viewing camera 8 feet behind thelawn mower, for example with an 8 foot pole or boom extended behind thelawn mower.

In some embodiments, the joined images A1 and B1 may appear slightlyoffset in size along line 58. In addition, image B1 portion of image 30Acan appear upside down or backwards, which is technically inaccurate orunorthodox, but the front view image A1 portion is the most importantimage portion and is an accurate view. However, image B1 portion can bestill of use for reference. Image 30A is a low cost way of giving theillusion of walking behind the lawn mower 10 or 11. However, if desired,the image 30A can be processed to flip or mirror image reverse the imageB1 to more accurately correspond to the view of image A1.

In some embodiments, the combined image 30A can be formed from images A1and B1 that are full images of the views A and B, and the overlappedregion C can be smoothed out with pixel smoothing and averaging. Sinceoverlapped region C is where images A1 and B1 overlap, there would be noclear dividing line 58 between the images A1 and B1. The overlappedregion C can be somewhat distorted, but can be sufficient for itsintended purpose.

In some embodiments, the two cameras can be directed to the sides oflawn mower 10 or 11, similar to an animal having eyes on the sides ofits head with images combined appropriately. Additionally, in someembodiments, more than two cameras can provide images which are combinedinto a single combined image 30A. For example, multiple cameras can bedirected toward the front, back, and sides. Cameras used can have normalviewing angles, wide angle viewing, or a combination thereof. Thecameras can be any suitable cameras, as know in the art, and can bedigital.

Referring to FIG. 13, in some embodiments, the lawn mower 10 or 11 caninclude a protective grill or guard 90, which can be mounted to or canbe part of the carriage 32 and/or housing 8 for at least substantiallylaterally surrounding and protecting the cutting system 72 or 74 andblades 12 or 19 from damage by large objects on the lawn 22 or ground 22a, such as branches 96. In one embodiment, the grill 90 can be a ring orgenerally annular in shape 92, having an outer periphery or diameter 98and an inner periphery or diameter 100. A series of grill members, barsor ribs 94 can be arranged spaced apart from each other in downwardlyand laterally or horizontally extending parallel fashion on the annularshape 92 to provide straight parallel lateral or horizontal gaps 102 fornot restricting and allowing the lateral or horizontal passage ofvegetation or grass 31 through the gaps 102 into the path of the cuttingsystem 72 or 74 and cutting pattern 38 for cutting, while at the sametime, blocking lateral or horizontal passage of large objects such asbranches 96 or body parts, such as a hand or foot. The bars 94 can beoriented to face in the direction of travel 46 of the lawn mower 10 or11. In some embodiments, the grill 90 can be sized and positioned suchthat the inner periphery 100 extends around the outer periphery orboundary 38 a of the cutting pattern 38 of the cutting system 72 or 74.In other embodiments, the grill 90 can be sized and positioned tooverlap with or coincide with the cutting pattern 38. The bars 94 insome embodiments can be about ¾ of an inch high and about ⅛ of an inchthick. The length of the bars 94 depends upon the location relative tothe annular shape 92 as seen. The bars 94 can be formed integrally withthe housing 8, or can be mounted to a bracket or ring that is in turnmounted to the housing 8 or carriage 32. In other embodiments, the shapeof the grill 90 does not have to be round or annular, and can includefor example, a pointed front or bow, such as in a boat, which canredirect branches 96 to the side. In addition, the pointed bow can alsohave an upward angling surface for lifting branches 96 off the lawn 22and then redirecting to the side. Also, in some embodiments, the bars 94can be a ring of evenly spaced downwardly extending vertically orientedrods or pegs.

Referring to FIG. 14, in some embodiments, the apparatus in the presentinvention can be a spreader for spreading spreadable products or itemsor components 66, including agricultural products such as seeds,fertilizer, chemicals, minerals, organic matter, etc. In suchembodiments, the cutting system 72 and the rotary member 20 can bereplaced with a spreading system 60 mounted to carriage 32 having arotary spreading member 62. The rotary spreading member 62 can berotatably mounted to drive motor 54 by shaft 52 about axis V_(r), andcan receive spreadable components 66 in granular, powder or liquid form,which can be spread in a desired pattern through holes 64 in the rotarymember 62 with rotation of rotary member 62 about axis V_(r) in thedirection of arrows 42. The holes 64 can be appropriately sized andpositioned for spreading granular or liquid spreadable components 66laterally around the carriage 32 and drive system 70. A reservoir orhopper 68 can supply the rotary arm 62 with the spreadable components66. At least one spreading arm 62 a of spreading member 62 can bepositionable, movable or rotatable laterally around the periphery of atleast one, more than one or all of the conveyance members 13 and 13 a.The spreading member 62 can be aligned along axis R_(m) and can belaterally straight, or can have portions which extend downwardly closerto the ground 22.

While this invention has been particularly shown and described withreferences to example embodiments thereof, it will be understood bythose skilled in the art that various changes in form and details may bemade therein without departing from the scope of the inventionencompassed by the appended claims.

For example, it is understood that features of the embodiments describedcan be combined or omitted. In addition, various sizes and shapes can bevaried as desired. The blades 12 and 19 have been shown and described asbeing generally elongate blades, but can have other suitable shapes.Blades 12 and 19 can have teeth and can include round saw blades. Ifdesired, a flexible cutting wire or cord, such as in a weed trimmer, canbe employed. Vegetation other than grass 31 in a lawn 22 can be cut, forexample, agricultural crops in fields, or clearing land. Someembodiments can be made in large size for rotating heavy blades and canbe driven by more powerful motors, which can include, electric, gas andhydraulic motors.

What is claimed is:
 1. A viewing system for a mobile apparatuscomprising: a first viewing camera mounted above the mobile apparatusand angled downwardly forwardly; a second viewing camera mounted abovethe mobile apparatus and angled downwardly rearwardly, images from thefirst and second cameras being overlapped with each other and combinedtogether to form a single combined image showing front and rear ends,and sides, of the mobile apparatus as well as some adjacent environment,to provide remote viewing of the mobile apparatus.
 2. The apparatus ofclaim 1 in which the apparatus is a lawn mower.
 3. The apparatus ofclaim 1 in which the images are combined together in an overlappingmanner.
 4. The apparatus of claim 1 in which the cameras are mounted toa structure extending above a carriage of the apparatus and each haveviews, one camera being angled downwardly forwardly and the other camerabeing angled downwardly rearwardly, the views of the cameras beingoverlapped with each other, the single combined image showing front andrear ends, and sides, of the apparatus as well as some adjacentenvironment.
 5. The apparatus of claim 1 in which the apparatus includesat least two cameras mounted thereto, and the images from the at leasttwo cameras being combined together to form a single combined image. 6.A method of viewing a mobile apparatus comprising: mounting a firstviewing camera above the mobile apparatus and angled downwardlyforwardly; mounting a second viewing camera above the mobile apparatusand angled downwardly rearwardly, images from the first and secondcameras being overlapped with each other and combined together to form asingle combined image showing front and rear ends, and sides, of themobile apparatus as well as some adjacent environment, to provide remoteviewing of the mobile apparatus.
 7. The method of claim 6 furthercomprising operating the apparatus as a lawn mower.
 8. The method ofclaim 6 further comprising combining the images together in anoverlapping manner.
 9. The method of claim 6 further comprising mountingthe cameras to a post extending above a carriage of the apparatus andeach camera viewing views, one camera being angled downwardly forwardlyand the other camera being angled downwardly rearwardly, the views ofthe cameras being overlapped with each other, the single combined imageshowing front and rear ends, and sides, of the apparatus as well as someadjacent environment.
 10. The method of claim 6 further comprisingmounting at least two cameras to the apparatus and combining the imagesfrom the at least two cameras together to form the single combinedimage.